https://blog.ryanlevick.com/posts/sudoku-solver-generator/
origin - https://www.pipiscrew.com/2018/09/sudoku-solver-generator-in-rust/ sudoku-solver-generator-in-rust
https://blog.ryanlevick.com/posts/sudoku-solver-generator/
origin - https://www.pipiscrew.com/2018/09/sudoku-solver-generator-in-rust/ sudoku-solver-generator-in-rust